Valve



March 30,1926., 1,578,443

L. KEITZ vALvE l Filed Deo. 22, 19.25

16 12 Il l 21 "I J a lg C i IZ' :18. 2 13 6 .I9 -7 ff `l 5', 57 a f4 215 Q (C) 22 f7 //*1 47 I limi; I. Heitz ATTORNEY Patented Mar. 30, 192.

' i unirse stares israele Parent orties;

LOUIS I. KEITZ, F CINCINNATI, OHO.

VALVE.

Application filed December 22, 1923. Serial Nol 682,279.

Vvention is to provide'a valve structure which will eliminate many otthe inconveniences contingent with the use of the approved types ottappet valve constructions, and one which is constructed to provideiirm, secure seating at all times, and eliminate leakage throughimproper seating; of the valve. I y Another object of this invention isto provide a valve structure as specified, Which includes a slidablevalvey lsleeve proidded with ports adaptedto register with suitablecylinder ports tor controlling the inlet or exhaust ot tuel into or fromthe cylinder structures of the engine, and to providea noveltorm oflocking structure which Will loclrthe valve structure in adjustedpositions against accidental movement under pressure. Y y

Other obj eots ot the invention Will appear in the following detaildescription, and in the accompanying drawings wherein:

Figure l-is a vertical section through an engine showing the improvedlvalve structure applied thereto.

Figure 2-is a horizontal section on` the line 2-2 of Figure 1.

Figure S-is a side elevation ot the sliding valve.

Figure et-is side elevation o't the` lock,- ing stein for locking thevalve in adjusted positions. y

Figure-is an edge elevation of the locking stein structure. f

Figure G-is a detail side elevation of a guide plate employed in thevalve structure.

Referring more particularly tothe drawings, the improved valve structureis illustrated as associated with an. internal oombustion engine 1 whichis of any approved type, the Walls ot which are provided With suitableports 2 to permit the ingress or egress of tuel into or `from thecylinder, it being understood that both the intake and the exhaust valvestructures are similar in constructure and that only one is shown 'inthe drawings,V and will'be hereinafter dcscribed. v l

flhe valve structure' comprises a valve sleeve 5 which is litted in avalve housing 8 formed .on the engine structure 1. The sleeve isprovided Vwith suitable ports-6 which register at all times with theports 2 and with a relatively large port k diametrically opposite to theports 6 which latter port is .adapted tocommunicate eitlierthe intake orexhaust manifold. 4

A sliding valve 8 is mounted in the sleeve 5 and is substantiallyvsemi-eylindrical in shape, being provided vwith ports 9 adapted.v70

to register at predetermined intervals with the ports 2 and 6. The upperend 10 of the Y sliding valve 8 is disc-lille in construction,

and has an inverted `cup 11 formed centrally thereon in which a spiralspring 12 is 75 mounted` Spiral clearance spring .12 [engages againsttheupper horizontal member 13 formed onthe looking stem structure 14, andit is coiled about the end 15 of the stein Whicliprojeots above themember .13 and extends through the cup 11. A lnut 16er other suitableobstruction may be, mounted upon the upper endotthe stem 15 for limitingthe movement ot the valve 8 relative t0 the looking' stem 14.l The inneredges S" 17 `of the valve 8 are slightly inclined, as clearlyshoyvn inFigure 3 ofthe drawings, and they 4are adapted to engage the .slightlyinclined edges 18 ot the substantially rectangular locking member 19kon'the stem 1e so that When the stem 1% isi in .its uppermost positionthe valve8 will he toreed against the interior of the valve'sleeve 5 forclamping and locking the spiral valve in position.

The member1 13 at the uper end ot the lock- 5 ing member 19, and thehorizontal member 20, at the lower end ot the rectangular loelo ingmember 19 are substantiallycircular in plan, and engage against theinner concaved surface ot' the sliding valve 8 cti-operating With theinclined edges 18 in looking the valves in position,v kA substantiallysemicylindrical guide plate 21 is fittedl in the sleeve. 5,'and is' ofsubstantially the .same thickness as the slidingvalve 8. The guide flplate 21 has a doivel 22 carried by its lower end Which tits in asuitable recess. inr the valve housing 3. A suitable cover 4 is providedior enclosing the upper end orn the valve structure, as clearly shown inFigs ure 1.

The locking stem 14: extends downwardly stem leithrough the housingextension 3, andy its lower end projects into a tappet 23 carried by thecrank-case of the engine. end of the stem 14 rests upon. operating pin'24 which isyieldably supported within the tappet 23 by means of thetension spring 25. An adjustingnut 26 is threaded into the tappet foradgius'ting the position of the pin. 24 and consequently, regulating4the tension ofthe spring 25. A suitable rocker 27 is provided whichis'operated by the Cani 28 for operating` the valve structure.` Asuitable opening` spring- 29 is coiled about the pin i4 and. has one endengaging vagainst the housing 3 and the other end engaging a suitablepin or support 30, carried by; the

(In operation,` when the valve is in'closed aesition, as shown in Figurel of theV drawings` thel sliding valve 8 is wedged tightly aggainstthesleeve andthe p o1ts2l and (i arev held closed. 'f When the. cam. 28rotates into releasing position, the same allows. the rocker 27gto drop,permitting the spring'. 29 lto reflex which moves the-'looking stem 14downwardly, releasing the *clamping pres sure againstthe sliding` valve8, which perfmits the spring-'12 to reflexV and allows the valve 8 todrop to bring the ports 9 therein in registration with the ports 6 and2. The valve is lifted to closed position by theupward movement of thestem i4, and engagement ofthe member 13 with the top i0 ot the. valveandafter the valve has been lifted it is wedged in closed position, by theco-engaging of the inclining surfaces 17, and

, lt is` ofcourse, to be understood, that the invention may bekconstructed in various other manners and the parts associa-ted inLdiii'erent relations, and therefore, l2 do not desire kto be limitedyin any manner, except as set forth in the claims hereunto appended.

` VVhatl claim is: y Y

l. In ay valve as specified, a ported valve sleeve, a sliding valvetherein, a lockingstem movable relative to the sleeve andY slidingyvalve, said valve and'lockinp; steinv provided with inclined-COLeneaging surfaces whereby the lockingfstem willvvedge the valve intoclamped V,locking engagement'with the interior of saidfslee've at prvdetei'iininedtiines.

2. In a valve as specified, a ported valve sleeve, a sliding valvetherein, a locking stem movable relative -to the sleevegand; slidingvalve, said valve and locking stem provided with inclined co--eno'afrineSurfaces whereb 2* 2') h l the locking;v stein.. will wedge/the valveinto claniped locking;` engagement with Vthe 1nterior of said sleeve atpredeterminedtimes, Y

The lower e and a clearance* springY associated with said valve andVlocking' stem to facilitate'port opening movement of the valve.

3. I-n-a valve; specied, a ported valve sleve, a slidingvalve therein,a. locking stem Amovable relative to ther sleeve and .sliding`valve,lsaid valve and locking stem provided with inclined co-e'ngagingsurfaces whereby7 the locking' stemv will Wedge the valve -into clampedlocking engagement with lthe interior ofs'aid sleeve atpredetermined,times, a clearance spring associated with said valve andklockingv stem to facilitate port opening movement of the valve, andadjustable means for moving),` said locking` stem.

, 4- In a valve as specified, a ported valve sleeve, a sliding. valvetherein, aloclting stein movable relative tothe sleeveand sliding valve,`said valve'and locking' 'stem provided with inclined co-engagingsurfaces whereby the locking stern will wedge the valve4 into clampedlool-:ing engagementwith thevinterior ofv saidfsleeve at predeterminedtimes, a clearance sprint'g",` associated with said valve and. locking.stern to facilitate port opening' movement ofthe valve', and a portsubstantially semi-cylindrical guide, plate within saidvsleeve andco-operating with Said slid-ing' valve. 4 v f i f5. In a valveA asspecified7 a ported valve sleeve, a substantially semi-cylindrical valvemovable therein and provided with ports for registrationwith the" portsin the sleeve, a

valve stem Ventendi nathrou O'h said rvsleeve, and

, m tu substantially semi-cylindrical valve, said semi-cylindrical valvehaving-a bearing at its upper end for receiving the upper end of saidstem,v said valve stein having a framelilejloclringv member formedthereon for enl gagement with said semi-cylindrical vvalve for lockingit in position.

6, In a valve as specified, a ported valve sleeve, a substantiallysemi-cylindrical valve movable therein and provided with ports forlrei'q'istration with the ports in the sleeve, a

' Louis i. narra.

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